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The synthetic form, cyanocobalamin, is the form most commonly used in supplements and foods, as it is cheap to produce

There is no established upper limit for B12 and no known health risks from increased intake from diet/supplements

The goal is finding the concentration sweet spot where doses fall in a range that is both easy to measure accurately and comfortable to inject

Vitamin B12 is a water-soluble vitamin, and this is one reason why higher vitamin B12 levels are not known to be toxic

Different forms of B12 are required in different areas of the body, so we provide three naturally occurring and bioactive forms - methylcobalamin, adenosylcobalamin and hydroxocobalamin - for greater health coverage